Phosphine-Catalyzed Reactions of Activated Olefins Tethered to Cycloalkanones. Substrate- and Solvent-Controlled Synthesis of Bicyclo[3.2.1]octanones, Mixed Acetals, and Morita–Baylis–Hillman Products
organocatalyzed reaction of cycloalkanones, i.e., cyclopentanones or 1,3-cyclopentanediones tethered to actived olefins, afforded selectively and in high yields three different types of products: bicyclo[3.2.1]octanones, mixed acetals, and Morita–Baylis–Hillman products. The progress of the reaction was closely related to the reaction medium and to the length of the tether located between the cyclopentanone (-dione)
所述Ñ -Bu 3 P organocatalyzed环烷酮的反应,即,环戊酮或1,3- cyclopentanediones拴actived烯烃,选择性地提供并以高收率三种不同类型的产品:双环[3.2.1] octanones,混合缩醛和森田–Baylis–Hillman产品。反应的进展与反应介质以及位于环戊酮(-二酮)和活化的烯烃之间的系链的长度密切相关。